From patchwork Wed Dec 23 23:27:54 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Feldman X-Patchwork-Id: 41712 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4D5ABB7BEB for ; Thu, 24 Dec 2009 10:28:07 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757196AbZLWX2A (ORCPT ); Wed, 23 Dec 2009 18:28:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755929AbZLWX17 (ORCPT ); Wed, 23 Dec 2009 18:27:59 -0500 Received: from sj-iport-5.cisco.com ([171.68.10.87]:6154 "EHLO sj-iport-5.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756351AbZLWX1y (ORCPT ); Wed, 23 Dec 2009 18:27:54 -0500 Authentication-Results: sj-iport-5.cisco.com; dkim=neutral (message not signed) header.i=none X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApsEABw2MkurRN+K/2dsb2JhbACDbb0DhwCPdoEvgi5WBA X-IronPort-AV: E=Sophos;i="4.47,445,1257120000"; d="scan'208";a="124589238" Received: from sj-core-4.cisco.com ([171.68.223.138]) by sj-iport-5.cisco.com with ESMTP; 23 Dec 2009 23:27:54 +0000 Received: from savbu-pc100.cisco.com (savbu-pc100.cisco.com [10.193.164.29]) by sj-core-4.cisco.com (8.13.8/8.14.3) with ESMTP id nBNNRsbq021764; Wed, 23 Dec 2009 23:27:54 GMT From: Scott Feldman Subject: [net-next PATCH 5/6] enic: feature add: add ethtool -c/C support To: davem@davemloft.net Cc: netdev@vger.kernel.org Date: Wed, 23 Dec 2009 15:27:54 -0800 Message-ID: <20091223232753.19428.92926.stgit@savbu-pc100.cisco.com> In-Reply-To: <20091223232551.19428.18916.stgit@savbu-pc100.cisco.com> References: <20091223232551.19428.18916.stgit@savbu-pc100.cisco.com> User-Agent: StGIT/0.12.1 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Scott Feldman Only rx_usec and tx_usec options for ethtool -C are settable as those are the only settings that make sense to HW. Adds driver reporting of intr coalescing timer value in usec units rather than HW units. Signed-off-by: Vasanthy Kolluri Signed-off-by: Scott Feldman --- drivers/net/enic/enic.h | 2 + drivers/net/enic/enic_main.c | 63 +++++++++++++++++++++++++++++++++++++++++- drivers/net/enic/enic_res.c | 12 +++++--- drivers/net/enic/vnic_enet.h | 5 +++ drivers/net/enic/vnic_intr.c | 8 +++++ drivers/net/enic/vnic_intr.h | 2 + 6 files changed, 85 insertions(+), 7 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h index b090d65..ee01f5a 100644 --- a/drivers/net/enic/enic.h +++ b/drivers/net/enic/enic.h @@ -93,6 +93,8 @@ struct enic { unsigned int mc_count; int csum_rx_enabled; u32 port_mtu; + u32 rx_coalesce_usecs; + u32 tx_coalesce_usecs; /* work queue cache line section */ ____cacheline_aligned struct vnic_wq wq[ENIC_WQ_MAX]; diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c index 019b148..e56f416 100644 --- a/drivers/net/enic/enic_main.c +++ b/drivers/net/enic/enic_main.c @@ -261,6 +261,62 @@ static void enic_set_msglevel(struct net_device *netdev, u32 value) enic->msg_enable = value; } +static int enic_get_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ecmd) +{ + struct enic *enic = netdev_priv(netdev); + + ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs; + ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs; + + return 0; +} + +static int enic_set_coalesce(struct net_device *netdev, + struct ethtool_coalesce *ecmd) +{ + struct enic *enic = netdev_priv(netdev); + u32 tx_coalesce_usecs; + u32 rx_coalesce_usecs; + + tx_coalesce_usecs = min_t(u32, + INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), + ecmd->tx_coalesce_usecs); + rx_coalesce_usecs = min_t(u32, + INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), + ecmd->rx_coalesce_usecs); + + switch (vnic_dev_get_intr_mode(enic->vdev)) { + case VNIC_DEV_INTR_MODE_INTX: + if (tx_coalesce_usecs != rx_coalesce_usecs) + return -EINVAL; + + vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ], + INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); + break; + case VNIC_DEV_INTR_MODE_MSI: + if (tx_coalesce_usecs != rx_coalesce_usecs) + return -EINVAL; + + vnic_intr_coalescing_timer_set(&enic->intr[0], + INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); + break; + case VNIC_DEV_INTR_MODE_MSIX: + vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ], + INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); + vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ], + INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs)); + break; + default: + break; + } + + enic->tx_coalesce_usecs = tx_coalesce_usecs; + enic->rx_coalesce_usecs = rx_coalesce_usecs; + + return 0; +} + static const struct ethtool_ops enic_ethtool_ops = { .get_settings = enic_get_settings, .get_drvinfo = enic_get_drvinfo, @@ -278,6 +334,8 @@ static const struct ethtool_ops enic_ethtool_ops = { .set_sg = ethtool_op_set_sg, .get_tso = ethtool_op_get_tso, .set_tso = enic_set_tso, + .get_coalesce = enic_get_coalesce, + .set_coalesce = enic_set_coalesce, .get_flags = ethtool_op_get_flags, .set_flags = ethtool_op_set_flags, }; @@ -363,12 +421,12 @@ static void enic_mtu_check(struct enic *enic) u32 mtu = vnic_dev_mtu(enic->vdev); if (mtu && mtu != enic->port_mtu) { + enic->port_mtu = mtu; if (mtu < enic->netdev->mtu) printk(KERN_WARNING PFX "%s: interface MTU (%d) set higher " "than switch port MTU (%d)\n", enic->netdev->name, enic->netdev->mtu, mtu); - enic->port_mtu = mtu; } } @@ -1990,6 +2048,9 @@ static int __devinit enic_probe(struct pci_dev *pdev, goto err_out_dev_deinit; } + enic->tx_coalesce_usecs = enic->config.intr_timer_usec; + enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; + netdev->netdev_ops = &enic_netdev_ops; netdev->watchdog_timeo = 2 * HZ; netdev->ethtool_ops = &enic_ethtool_ops; diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c index a605da1..02839bf 100644 --- a/drivers/net/enic/enic_res.c +++ b/drivers/net/enic/enic_res.c @@ -66,9 +66,9 @@ int enic_get_vnic_config(struct enic *enic) GET_CONFIG(wq_desc_count); GET_CONFIG(rq_desc_count); GET_CONFIG(mtu); - GET_CONFIG(intr_timer); GET_CONFIG(intr_timer_type); GET_CONFIG(intr_mode); + GET_CONFIG(intr_timer_usec); c->wq_desc_count = min_t(u32, ENIC_MAX_WQ_DESCS, @@ -88,15 +88,17 @@ int enic_get_vnic_config(struct enic *enic) max_t(u16, ENIC_MIN_MTU, c->mtu)); - c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer); + c->intr_timer_usec = min_t(u32, + INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), + c->intr_timer_usec); printk(KERN_INFO PFX "vNIC MAC addr %pM wq/rq %d/%d\n", enic->mac_addr, c->wq_desc_count, c->rq_desc_count); printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d " - "intr timer %d\n", + "intr timer %d usec\n", c->mtu, ENIC_SETTING(enic, TXCSUM), ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO), - ENIC_SETTING(enic, LRO), c->intr_timer); + ENIC_SETTING(enic, LRO), c->intr_timer_usec); return 0; } @@ -303,7 +305,7 @@ void enic_init_vnic_resources(struct enic *enic) for (i = 0; i < enic->intr_count; i++) { vnic_intr_init(&enic->intr[i], - enic->config.intr_timer, + INTR_COALESCE_USEC_TO_HW(enic->config.intr_timer_usec), enic->config.intr_timer_type, mask_on_assertion); } diff --git a/drivers/net/enic/vnic_enet.h b/drivers/net/enic/vnic_enet.h index 6332ac9..8eeb675 100644 --- a/drivers/net/enic/vnic_enet.h +++ b/drivers/net/enic/vnic_enet.h @@ -20,6 +20,10 @@ #ifndef _VNIC_ENIC_H_ #define _VNIC_ENIC_H_ +/* Hardware intr coalesce timer is in units of 1.5us */ +#define INTR_COALESCE_USEC_TO_HW(usec) ((usec) * 2/3) +#define INTR_COALESCE_HW_TO_USEC(usec) ((usec) * 3/2) + /* Device-specific region: enet configuration */ struct vnic_enet_config { u32 flags; @@ -30,6 +34,7 @@ struct vnic_enet_config { u8 intr_timer_type; u8 intr_mode; char devname[16]; + u32 intr_timer_usec; }; #define VENETF_TSO 0x1 /* TSO enabled */ diff --git a/drivers/net/enic/vnic_intr.c b/drivers/net/enic/vnic_intr.c index 1f8786d..3934309 100644 --- a/drivers/net/enic/vnic_intr.c +++ b/drivers/net/enic/vnic_intr.c @@ -50,12 +50,18 @@ int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, unsigned int coalescing_type, unsigned int mask_on_assertion) { - iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer); + vnic_intr_coalescing_timer_set(intr, coalescing_timer); iowrite32(coalescing_type, &intr->ctrl->coalescing_type); iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion); iowrite32(0, &intr->ctrl->int_credits); } +void vnic_intr_coalescing_timer_set(struct vnic_intr *intr, + unsigned int coalescing_timer) +{ + iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer); +} + void vnic_intr_clean(struct vnic_intr *intr) { iowrite32(0, &intr->ctrl->int_credits); diff --git a/drivers/net/enic/vnic_intr.h b/drivers/net/enic/vnic_intr.h index f79a722..2fe6c63 100644 --- a/drivers/net/enic/vnic_intr.h +++ b/drivers/net/enic/vnic_intr.h @@ -102,6 +102,8 @@ int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, unsigned int index); void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, unsigned int coalescing_type, unsigned int mask_on_assertion); +void vnic_intr_coalescing_timer_set(struct vnic_intr *intr, + unsigned int coalescing_timer); void vnic_intr_clean(struct vnic_intr *intr); #endif /* _VNIC_INTR_H_ */